I'm a fan of the reduced shot 12ga. loads for skeet & general clay target practice shooting.
The factory Winchester Featherlight loads utilize 26grams of shot & they break targets just fine inside 35 yards or so. Factory duplicate recipe for the WWAA Featherlight load & some others from 980fps @ 5600psi up to 1145fps @ 8800psi can be found in the Hogdon's Basic Reloading Manual printed January 2010. Alliant also lists a number of std. velocity/low pressure lighter shot loads.
As KR has noted, down range ballistics deteriorate rather quickly for target sized pellets. OTOH, bunker loads [24grams] are typically 1300+fps., but the reasoning as I understand it is more to get the patterns to open more uniformly than to do with terminal ballistics. Many of those loads use wads w/stiff &/or 'stitched' petals.
FWIW, I have loaded several 3/4oz. 12ga. recipies that provided too tight patterns at lower velocities using powders on the slow side. Cleaner burns [if that matters to you] and generally better skeet range patterns will be attained with the faster powders or in some cases with more of the same powder which may seem a bit of a paradox. Regardless, stay with published recipies, stay safe & use the pattern board/grease plate to KNOW what the loads do in your gun. The lighter loads can be a real joy to shoot & they function perfectly all the time w/two triggered or mechanical single trigger guns.
